Several of the students in Mr. Camp’s class had difficulty behaving in line. He thought he had managed to get them under control with reinforcement. He had been giving them a token every time they lined up in an orderly fashion. While it initially worked like magic, now the students were falling back into their old patterns. What type of reinforcement schedule should Mr. Camp have used after his students had mastered lining up in an orderly fashion?

A. Shaping B. Intermittent reinforcement C. Continuous reinforcement D. Applied behavior analysis